Explore this educational blog section all about diamonds, engagement rings, precious metals and jewellery production.  

Polished Diamonds have a reputation for integrity, trust and our staff are ready to help.

Our experienced team is available online via live chat, email or telephone. We offer a friendly, personal service that can help you make an informed decision regarding any jewellery purchase you’re currently considering.

As jewellery design requires accuracy down to the nearest point of a millimetre, Magnetic Resonate Image (MRI) scanning is the most effective and efficient way to do so. Quality and accuracy are paramount here at Polished Diamonds therefore, by using this method of scanning we can ensure that your ring is as close to perfect as physically possible.

Engagement rings are a gift that a partner gives to their prospective spouse which  symbolises that the person wearing it is engaged to be married. In Western countries, these rings are generally worn by women and they will often feature diamonds or gemstones as a decorative feature.

Diamond cutting is the term used to refer to the practice of changing a diamond from a rough stone to a faceted gemstone - a 'Polished Diamond'.

With the excitement that accompanies the process of choosing an engagement ring, many overlook the later task of choosing a wedding band that compliments it and forms the perfect set. Having a completed set that not only sits flush but has a beautiful, complimenting design is important to us. 

Polished Diamonds offer the Worlds best GIA certified Diamonds, we are award winning Jewellers of Distinction for Diamond Rings, Engagement Rings and Wedding Rings.

Carbonado, more commonly known as ‘black diamond’ is becoming a more and more popular choice in the jewellery world. Whilst offering a stark contrast in colour and shine to the more traditional white diamond, they are a unique and eye-catching addition to any piece of jewellery.

Perfect Diamond Trilogy Ring

Here at Polished Diamonds US, technology has allowed us to create your engagement ring to perfection using our Computer Aided Design software, also referred to as CAD. This process is in replacement of hand drafting and sketches, meaning the design process is precise down to 0.01mm or the thickness of human hair.

Having the ability to draft our rings with such accuracy means we can create you a perfect visual representation of your custom designed ring modeled to your finger size and diamond measurements.  Never before have jewellers been able to create any ring design with such precision and accuracy the result is a flawless diamond engagement ring - wow.

           CAD Trilogy Ring Design:                                 Finished Trilogy Ring:

PDN241 marquisepear3stn GERALD RENDER1    actual finish ring

Followingthe digital design process, we 3D print the unique ring into a wax polymer model to take the digital design to physical form.  This revolutionary process avoids any potential human errors and ensuring exact symmetry and replication. Once we have a perfect wax model we then cast this with any of our high quality metals, including platinum, rose gold, yellow gold and white gold. Once the metal has been cast we have the perfect replication of our digital CAD design in the precious metal.  Our bench jewellers have over 50 years experience in hand polishing and hand setting the diamonds or gemstones.  There is no substitute for traditional hand craftsmanship in the clean up, polishing and setting stages.  This process means we have the tools to make any design, with such precision that Polished Diamonds has a strong focus on creating the most perfect ring possible for each of our valued customers.  We boast to be able to produce the most accurate and perfect diamond engagement ring and using this process we deliver time after time.  Each unique jewellery item is backed with a lifetime guarantee so the quality in the build is never compromised resulting in your complete satisfaction.  The amazing point of CAD design is clients do not have to come into our design studio as the digital images can be emailed around the world for clients to confirm or make small adjustments.  When setting GIA certified diamonds with laser inscriptions for security clients can trust the gemstone is correct.

Some CAD Design Examples:

 CAD1   CAD2

By producing specialised rings with this design and 3D printing process provides us with a point of difference from other jewellers who sell stock items, this also means we are so confident in the quality of our products we offer a lifetime guarantee, so you can feel just as confident. All of our diamonds come with GIA certification, to instill that confidence, so you know you are getting a product of superior quality. Although our process is in such detail, our talented designers work hard to have your unique ring created in just 10-15 days. We guarantee to create you whatever design you desire while working within your budget. Using the CAD design system you can find any inspiration from images online like Pinterest and Google images which we can then draw up in a proportional sketch in our architectural CAD software.  For the perfect diamond engagement ring or precious jewellery item contact Polished Diamonds - we'd love to help. 

Here are some more CAD Design Examples: 

CAD13   CAD16

To view more of our previous CAD designs, click here.

We would love to help you create your perfect engagement ring, so do get in touch: either visit our design studio at 30 New Regent Street, CBD for a chat or send us and e-mail at This email address is being protected from spambots. You need JavaScript enabled to view it. 

Coloured diamonds

Despite the fact diamonds exist in over 300 different colours, white is by far the most common and preferred. Diamonds can be found in nature in any colour form with varying shades and hues, with it also being the hardest naturally occurring material.

Here at Polished Diamonds we custom design and make both engagement and wedding rings. Each ring we create is personalised to best suit the customer’s needs.

Emerald engagement ring

Perhaps a diamond ring isn't for everyone, here at Polished Diamonds we want to help you create a unique ring that is perfectly suited for you. The Emerald gemstone is one of the four most recognized gemstones along with ruby, sapphire and diamonds. 

celebrity rings

Wanting some inspiration for your engagement rings? Check out some of these celebrity rings, they're incredible!

Rose gold is one the gold rings available and is less common than white and yellow.

Diamonds are the hardest natural substance on Earth yet the oil from the touch of a human finger can cause dirt to collect and make this nearly indestructible gemstone quickly lose its sparkling appeal. Here are some tips on how to keep your diamond ring sparkling.

As we custom design all our jewellery you can have a really unique ring and get it exactly how you imagined it.

Polished Diamonds manufacture every custom made diamond ring to suit each unique client so any design is possible. We have access to the Worlds best diamond stock so any diamond can be used in your chosen design. So how does it all work?

Here at Polished Diamonds we can offer you every ring style imaginable, from the traditional solitaire to the bolder halo, we have the perfect engagement ring for her lifestyle and your budget.

As Jewellers of Distinction, Polished Diamonds can create any ring design to suit your dreams, budgets and expectations.  So how does it all work and where do I start?

There are a wide range of precious metals available for you to construct a diamond ring. The most popular metals are the ones that are very white or yellow in colour.

diamond colour

Diamonds come in a variety of colours and the most popular for jewellery are the white series of diamonds.

Natural pink diamonds aren’t very common they only account for about 1% of the total production of diamonds in the world. 

Polished Diamonds provides an interactive tool to help select your diamond and compare the vital factors of price, colour, carat and clarity. The cut quality is also an important factor in deciding which diamond would best suit you.

Here at Polished Diamonds we sell only conflict free and ethically mined diamonds that respect nature and the environment. The Diamonds we sell originate from Kimberley Certified and United Nations sanctioned countries only. 

The 5 C’s in the diamond grading process relate to Carat, Cut, Colour, Clarity and Certification.  In this educational blog article we discuss these diamond characteristics.

Traditions are a huge part of a couple’s wedding day. Whether it be ‘something old, something new, something borrowed or something blue’ or simply the bride wearing a white wedding dress, there is a reason behind everything.

Flower bouquets are a unique addition to any wedding. Many people are under the impression that brides carry a bouquet simply for aesthetic purposes however, there are far more sentimental reasons than just ‘the look’.

We have gathered colours from global trends, textures, décor and themes.

Feeling overwhelmed about planning your wedding? This infographic can help you with every stage, from setting a budget to getting your nails done.

Engagement Proposal

Is she a laid back type of woman, or is she the centre of attention when you go to parties? A woman’s personality should always be factored into a marriage proposal.

Black is the new black. It’s what the coolest people wear, from Darthvader and Batman to Ninjas and now you. Zirconium is a natural element found in our earth, mostly in Australia and South Africa and it’s natural color is actually a grayish silvery white. Zirconium has a super high resistance to corrosion.

In the midst of all the preparation for your wedding you might push finding a wedding ring to the bottom of your to do list, but it’s something you will be wearing for years to come so it’s important to get it just right.

Polished Diamonds Jewellery Design began in Christchurch, operating from 30 New Regent Street. Founded in 2003 and winning the ‘Best Retailer’ at the business awards, it was only fitting to open a second store in Ponsonby, Auckland.

Determining your ring size can be a challenge but is a crucial part of the design and manufacturing process. Due to a range of different factors one’s ring size can drastically change however, with a range of different techniques available you can be sure to find the best fit!

Finding and designing jewellery that is both unique and personal to you can be challenging. With an increasing number of Jeweller’s mass producing their stock, makes it easy to follow trends and settle for common designs. However, here at Polished Diamonds - Jewellery Design you can be guaranteed something unique, personal and incomparable at a better price than the mass produced clones.

Valentines day is one we all know and love. It is a celebration for those seeking love, in love and perusing love. It is a day for romantic gestures, gift giving and admiring. However, is it just all chocolates and flowers or is there some history behind the so called ‘day of love’?

Cameo Jewellery

The earliest widespread use of shells for cameo carving was during the Renassiance, in the 15th and 16th centuries. Antique cameos are recognised by their common attributes - a woman's profile carved out of a white shell placed against a coral background. Although this is now the standard design for vintage cameos, it certainly is not the only!

Your guide to buying diamond engagement rings and jewellery in Christchurch, New Zealand

A diamond bracelet is a tangible touch of beauty.  Placed on the wrist of a woman it flows with every movement of the arm, adding fascinating sparkle in motion.

Custom made ring

We can custom design any ring for any occasion just like these rings for the Euro 2016 championship.

Pantone are commonly known for their standardized colour matching system, used around the world. They not only specialize in differentiating color shades but attempt to look beyond what the eye can see and discover what colors represent. It is for this reason that a ‘color of the year’ is chosen on an annual basis – and for 2018 ‘Ultra Violet’ was their choice.

Sapphire is known as one of the hardest existing gemstones, therefore making it the most desirable gem to use for wedding and engagement rings due to it’s durability. Sapphires exist in a range of different colour shades from the classic blue to black, pink, yellow, green, white and the less well known padparadscha.

garnet gemstone and garnet colour

Did you know the garnet does not just come in red? The January birthstone offers an extensive palette ranging from greens to purples, through the more common red tones including orange, pinks and red. 

Sapphire is a beautiful gemstone that is suitable for all types of jewllery. It comes in a large selection of colours which make it versatile and easily able to compliment many other gemstones. Here we inform you of a few different colour varieties available.


Have you ever thought about how gemstones are actually formed? I hadn’t. I’d never really given it much thought. I just oohed and ahhed over the amazing colours and gorgeous jewellery that I’d seen in magazines, boutiques and on celebrities.

Found in just one place on earth, tanzanite is a relatively recent discovery and this blue variety of zoisite was named after Tanzania, the country where it was found, and can only be found.


The glorious green colour of Emerald has made the stone highly prized for many thousands of years. Believed to protect the wearer from misfortune, it has a mystical quality that soothes and promotes tranquillity.

Peridot is one of the few gemstones that exists in only one colour, a distinctive lime green.


Rubies are always fashionable and complement virtually everyone who wears them. In addition to being the official birthstone for July and the traditional gift for 40th wedding anniversaries, the ruby frequently is given in celebration of the birth of a daughter.

Pearls are unique as they are the only gems from living sea creatures and unlike other gemstones require no faceting or polishing to reveal their natural beauty.